Guides · Formats & privacy
What the formats do, and what your files give away.
The converters here do one job each. These guides cover the parts around the job: why your phone picked a format nothing can open, what a photo quietly records about where you were, which format to reach for and why — and how to audit any converter on the web, this one included.
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Apple formats
What HEIC Is, and When to Convert ItWhy Apple ships it, why Windows and Chrome often can't open it, and when converting helps.
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Photo privacy
What Your Photos Reveal: EXIF and GPSCoordinates, timestamps, device serial numbers — where they leak and how to check yours.
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Format choice
JPG, PNG, or WEBP: Which One, WhenLossy versus lossless, transparency, and why a PNG of a photograph is enormous.
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Verification
How to Tell If a Converter Uploads Your FilesTwo tests anyone can run — the Network tab and the airplane-mode check — on any site.
How these guides are written
Each one is anchored to something you can verify yourself: a setting you can open, a file you can inspect, a test you can run with your own browser. Where the honest answer is a trade-off rather than a rule — converting to JPG makes the file bigger, stripping metadata does not hide what is visible in the frame, a platform that usually removes EXIF is not a guarantee — the guide says so rather than selling the simpler version. The last guide deliberately teaches you to audit this site as thoroughly as any other, because a privacy claim nobody can check is not worth making.